1990 4.0 Spark Plug Gap - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Cherokee & Comanche Forums > XJ Cherokee Technical Forum > 1990 4.0 Spark Plug Gap

Smittybilt Products at Oconee Off-Road!Trick Tabs - NalinMFG.comCCOR is your 1 stop source for everything Jeep!

Reply
Unread 10-06-2007, 11:56 AM   #1
BuddhamanJB
Registered User
1997 ZJ 
 
Join Date: Jul 2007
Location: Rhode Island
Posts: 32
1990 4.0 Spark Plug Gap

I'm changing the plugs on my '90 cherokke tomm. it has a 4.0 in it and I was wondering what the GAP on the plugs should be. Thanks

BuddhamanJB is offline   Reply With Quote
Unread 10-06-2007, 11:57 AM   #2
BeachinXJ
Resident McGeek
 
BeachinXJ's Avatar
2000 XJ Cherokee 
 
Join Date: Jun 2003
Location: The Beach®, DE
Posts: 5,837
.035

(FYI- sticker in your engine compartment should have this info on it. Up on the firewall on the drivers side. If I remember correctly).
__________________
2000 Jeep XJ - Chopped / Locked
1997 Jeep XJ - Daily Driver
2003 Dodge Ram 2500 CTD - 6-speed, 4" MBRP Turbo Back Exhaust
Join the XJ Owners Club | Download the iMarn® iPhone App!
SIRA 4x4 Offroad Association
Rule #1 - No talking about the weather!
Homepage | Jeepspace Group|Twitter!|Facebook
BeachinXJ is offline   Reply With Quote
Unread 10-06-2007, 12:09 PM   #3
BuddhamanJB
Registered User
1997 ZJ 
 
Join Date: Jul 2007
Location: Rhode Island
Posts: 32
thanks alot
BuddhamanJB is offline   Reply With Quote
Unread 10-06-2007, 02:42 PM   #4
BrunoS
Registered User
 
Join Date: Aug 2004
Location: South Bay Los Angeles, CA
Posts: 2,534
try autolite 3924, regular reach, old-school style spark plugs.

the long-reach plugs recommended in most books are TOO hot of plug (rough idle misfire) this includes autolite 985 and champion R12YC plugs...those are all long reach and if you have a rough idle when motor is warmed up...caused by too hot heat range long-reach plugs.

go to store and look at all these plugs...you'll see what i mean.
__________________
Newly Painted! Emerald Green '96 XJ 4x4 4.0 HO 5-spd
3" Lift + 31" Tires / D35 TracLok / NP231
Drilled out Stock Airbox / Gauge Cluster Upgrade
Magnaflow Muffler / High-flo Cat / MSD Coil
BrunoS is offline   Reply With Quote
Reply
Thread Tools


Suggested Threads





Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.